... I have read that pure sativas are not great indoors...
Because they require a lot of light, and vertical space to grow. And they have a narrow ideal temp window. And they can grow for a year. And they like to be rained upon, and that’s difficult to simulate indoors. I’ve grown pure Colombian red, Jamaican, and more recently Train Wreck, a Sativa dom hybrid from NorCal.
Sativa is slow with lower yield, but has a superior effect that cannot be ignored. It is worth the work and wait.
Allowing for lying about strain names, and more likely unintentional misinformation, very little of what is offered as Sativa truly is these days.
Durban South African is from the strain most frequently distributed in the early days of mass global circumnavigation, the 1700s. Sailors and slaves carried cannabis seeds from India, trading and dropping them along the way in many places that became iconic for quality bud: Jamaican and the Caribbean, Thailand and SE Asia, Hawaii, and of course South Africa.
Some say that what we call Indica originated in what is Afghanistan, and what we call Sativa is from India. And Native American hemp is the true Sativa. Who cares? It’s all good
Enjoy the history. Enjoy your harvest. Enjoy the now!